How to Generate DataTable with Json Data - ajax

I have API Call abd which will be returning Json like below
{
"status": true,
"message": "Data Sent",
"data": [
{
"id": 9,
"name": "North",
"colType": 7,
"userID": 0,
"isVisible": false
}
]
}
And below i have JavaScript Ajax Call but it is returning Empty datatable please do help
$('#myTable').DataTable({
destroy: true,
responsive: true,
"ajax": {
"url": url+'/api/CommonMasters/7/GetByUserID/'+#ViewBag.UID,
"type": "GET",
"datatype": "json",
},
"lengthMenu": [[10, 25, 50, -1], [10, 25, 50, "All"]],
"columns": [
{ "data": "name", "autoWidth": true },
{
"render": function (data, type, full, meta) { return "<a id='Edit' class='btn btn-info' onclick='editRefUser(" + full.id + ")' ;>Edit</a>"; }
},
]
});

In the ajax section, you need to define your data source: "dataSrc": "data".
"ajax": {
"url": url+'/api/CommonMasters/7/GetByUserID/'+#ViewBag.UID,
"type": "GET",
"datatype": "json",
"dataSrc": "data"
},
Why is this needed? Your JSON data structure does not have a "name" item at the top level. Names are nested inside the top-level "data" object. This extra directive tells DataTables to look only at the JSON's "data" object as its starting point.
See here for the related documentation:
The ajax option basically inherits all of the options made available by jQuery.ajax, but we provide the extra option of dataSrc to provide the ability to alter what data DataTables will read from the JSON returned from the server...
Also, on an unrelated note, I don't think you need this: destroy: true - try removing it. It probably does not make sense to try to destroy the table object while you are initializing it.

Related

DataTables warning: Requested unknown parameter "FileName"... using Json

I have a view which loads the script:
var dataTable;
$(document).ready(function () {
loadDataTable();
});
function loadDataTable() {
dataTable = $('#DT_load').DataTable({
"ajax": {
"url": "/musicfiles/getall/",
"type": "GET",
"datatype": "json"
},
"columns": [
{
"data": "albumartpath",
"render": function (data) {
return `<img src="~/images/" + ${data} ?? "noimage.webp" asp-append-version="true" height="50" width="50" />`;
}, "width": "20%"
},
{ "data": "filename", "width": "20%" },
{ "data": "title", "width": "20%" },
{ "data": "artist", "width": "20%" },
{ "data": "genre", "width": "20" }
],
"language": {
"emptyTable": "no data found"
},
"width": "100%"
});
}
and a MusicFilesController function which returns a Json:
[HttpGet]
public async Task<IActionResult> GetAll()
{
JsonResult json = Json(new { data = await _context.MusicFiles.ToListAsync() });
return json;
}
but when I load the page, I get the error:
DataTables warning: table id=DT_load - Requested unknown parameter 'FileName' for row 0, column 1. For more information about this error, please see http://datatables.net/tn/4
The Json is correctly formatted using strings but I cannot figure out what I am missing. I have looked through about a dozen other posts with similar issues but have not found the answer.
Requested unknown parameter 'FileName' for row 0, column 1.
In your code, we can find that you specify columns.data option with { "data": "filename", "width": "20%" }, if the data source object item(s) with key fileName like below (not filename you specified), which would cause the issue.
{"albumartpath":"https://xxxx/xxx","fileName":"xxx","title":"xxx","artist":"xxx","genre":"xx"}
So please double check the received data on client side and make sure you set the data source for the column correctly.

Datatable YADCF server side filter type

I am using yadcf column filters to a server side DataTables.js request.
yadcf.init(table, [
{
column_number: 0,
filter_type: "text",
filter_default_label: "Search",
filter_reset_button_text: false
},
{
column_number: 1,
filter_type: "select",
filter_reset_button_text: false
},
]
Request give me
columns[X][search][value]
columns[X][search][name] like this but I want to get column yadcf column attribute filter_type .
This data help to search for contains search or equals search
How is it get? or change scripts.
Version 0.9.3
I send mail to Daniel Reznick (yadcf writer)
Daniel Reznick answers :
I think you could achieve it by using some datatables "pre XHR" event / hook in which you can modify the XHR request before its being sent to server, but IMO since this is being initialized only once (when you write your JS code) I guess you can do it "hard coded" on server
My Code like this
var table = $("#datalist")
.on('preXhr.dt', function (e, settings, data) {
var yadcf = [];
$('.yadcf-filter').each(function (data) {
input = $(this)
var col = {
"type": input.attr('type'),
"filter_match_mode": input.attr('filter_match_mode'),
"column_number": input.attr('id').replace('yadcf-filter--datalist-', '')
}
yadcf.push(col);
});
data.yadcf = yadcf;
})
.DataTable({
"ajax": {
"url": "/url",
"type": "POST",
"datatype": "json"
},
yadcf.init(table, [
{ column_number: 1, filter_type: "text", filter_default_label: "Contains Search", filter_reset_button_text: false, filter_delay: 500, filter_match_mode:"contains"},
{ column_number: 2, filter_type: "text", filter_default_label: "Exact Search", filter_reset_button_text: false, filter_delay: 500, filter_match_mode: "exact" },
{ column_number: 3, filter_type: "text", filter_default_label: "Starts With Search", filter_reset_button_text: false, filter_delay: 500, filter_match_mode: "startsWith" },
]

jQuery Datatable Pipeline using server side - data not loading

I am working on jQuery datatable and trying to implement pipeline feature using server side processing. (following the code same as suggested in the below jQuery site)
https://datatables.net/examples/server_side/pipeline.html
Actual Scenario
My implementation differs only in the data part where my data is array of objects but as per the reference, the data is ajax sourced..
My Ajax response from REST API ::
{
"status": true,
"data": [{
"dbid": "xyz",
"name": "QA Pt",
"email": "a+123#gmail.com",
"isactive": true,
"Datecreated": "2018-06-04",
"lastmodified": "2018-06-04",
"newfields": {
"firstname": "QA",
"lastname": "Pt",
"viewonlyadmin": "no",
"usertype": 0
},
"userid": "85097428"
}, {
"dbid": "xyz",
"name": "QA Pt",
"email": "a+123#gmail.com",
"isactive": true,
"Datecreated": "2018-06-04",
"lastmodified": "2018-06-04",
"newfields": {
"firstname": "QA",
"lastname": "Pt",
"viewonlyadmin": "no",
"usertype": 0
},
"userid": "85097428"
}],
"recordsTotal": 597,
"recordsFiltered": 597,
"draw": 1
}
Pipeline feature and the Pagination part works perfectly but the data in table is always shown as "No matching records found"
When i tried debugging the code, in drawcallback function 'settings' object -> aoData is always empty.
Below is the screenshot of the table.
Scenario 2
The other fix I tried is by passing json.data to drawcallback function instead of drawcallback(json) in ajax success function. In this case, the data is shown in the table but the pagination part is failing. PFB the screenshot.
Any one have idea on why this data is not being applied to the table? Looking for some help on fixing this issue..
Assuming you are trying to return json from API as follows.
return Json(new
{
// this is what datatables wants sending back
draw = 1,
recordsTotal = result.Count(),
recordsFiltered = 10,
data = result
});
Just change this to return Json(result); So your json result looks like
[{
"Latitude": 18.00,
"Longitude": 23.00,
"Name": "Pune"
}, {
"Latitude": 14.00,
"Longitude": 24.00,
"Name": "Mumbai"
}, {
"Latitude": 34.004654,
"Longitude": -4.005465,
"Name": "Delhi"
}, {
"Latitude": 23.004564,
"Longitude": 23.007897,
"Name": "Jaipur"
}]
Now, in your ajax success, make datatables like this. Reason to use ajax success is it is assumed that you get all the data at one round trip to server.
$.ajax({
url: "Your API Url",
type: "GET",
contentType: "application/json; charset=utf-8",
datatype: JSON,
success: function (result) {
var my_columns = [];
$.each(result[0], function (key, value) {
var my_item = {};
my_item.data = key;
my_item.title = key;
my_columns.push(my_item);
});
$('#table1').DataTable({
"data": result,
"columns": my_columns
});
}
});

D3.js IE9 error on checking nodes in graphdata

I am having a problem fixing this error. May be someone can explain what is going on here:
I am getting JSON back from server:
d3.json(fullpath, function (json)
{
graphData = json;
if (graphData.nodes.length == 0)
{
$.jnotify("Sorry there is no data for graph. Please include social media type in search.");
}
drawGraph();
});
here is part of the json:
"nodes": [{
"id": 1,
"userID": 1,
"profile_image_url": "images/twitterimage_1.jpg",
"description": "user1 desc",
"name": "user 1",
"location": "Berlin",
"statuses_count": 5,
"followers_count": 1
}
,
{
"id": 2,
"userID": 2,
"profile_image_url": "images/twitterimage_2.png",
"description": "user2343434 desc",
"name": "user 2",
"location": "Berlin",
"statuses_count": 6,
"followers_count": 2
}
then on this line: 'if (graphData.nodes.length == 0)' I do have this error:
'Error: Unable to get value of the property 'nodes': object is null or undefined'
And this is only in IE, not a problem in Chrome or Firefox.
Please help!
thanks!
ok. the problem was in this line:
d3.json(fullpath, function (json)
Do you know that IE does json asynchronously be DEFAULT?
and Chrome/Firefox does this call synchronously?
So, the work around is to switch to .ajax call from jquery library:
$.ajax({
url: dataPath,
dataType: 'json',
async: false,
data: null,
success: function (response)
{
}
thanks!

Attempting to load Ext store with JSON data from AJAX request returns error

Am attempting to load and Ext Store with Ext 4.0.7.
It is returning an Object doesn't support this property or method error when i call the loadRawData method on the store in the success callback of the AJAX request.
Here is the data i am loading:
{
"data": [
{
"id": 1,
"source": "1445261",
"target": "1437043",
"sourceType": "user",
"redirectUrl": "http://www.google.co.uk",
"message": "this is a notification message",
"targetType": "user",
"messageType": "notification",
"sentDate": "1354758001",
"notificationType": "notification",
"parameters": "null",
"read": "false",
"readDate": 1354758001
},
{
"id": 2,
"source": "1445261",
"target": "1437043",
"sourceType": "user",
"redirectUrl": "http://www.google.co.uk",
"message": "this is a notification message",
"targetType": "user",
"messageType": "notification",
"sentDate": "1354758001",
"notificationType": "notification",
"parameters": "null",
"read": "false",
"readDate": 1354758001
},
{
"id": 3,
"source": "1445261",
"target": "1437043",
"sourceType": "user",
"redirectUrl": "http://www.google.co.uk",
"message": "this is a notification message",
"targetType": "user",
"messageType": "notification",
"sentDate": "1354758001",
"notificationType": "notification",
"parameters": "null",
"read": "false",
"readDate": 1354758001
}
]
}
This is the store code and ajax request:
var infoStagingStore = Ext.create('Ext.data.Store', {
model: 'SCB.RMWB.InfoBar.Model.Message',
storeId: 'Staging',
autoLoad: false,
pageSize: 10,
proxy: {
type: 'pagingmemory',
reader: {
type: 'json',
root: 'data'
}
},
listeners: {
load: function(){
console.log('loaded');
}
}
});
Ext.Ajax.request({
url: '/rmwb/resources/js/app/infoBar/data/data.json',
timeout: 60000,
method: 'GET',
scope: this,
params: '',
success: function(resp) {
console.log(resp.responseText);
var store = Ext.data.StoreManager.lookup('Staging');
store.loadRawData(resp.responseText, true);
},
failure: function(resp, opts) {
},
callback: function(options, success, resp) {
}
});
Can't quite see why this is returning an error?
As in my comment, you donĀ“t need a pagingmemory store. What you need is an ajax store because the pagingstore is for allowing pagination with data you have in memory but there is no reason to use it seeing your requirement.
So if you use an standard ajax proxy, you will be able to load it in the normal way (using the .load() method). Then, when you need to add more record from the server you what you have to do is just call the load method again but with the addRecords option.
For example (untested sample):
// load store with historical data
infoStagingStore.load();
// load more records to the store from a different resource
infoStagingStore.load({
url: '/rmwb/resources/js/app/infoBar/data/data.json',
addRecords: true
});
Seeing as you've assigned your store to a variable called infoStagingStore could you not just reference that directory in your ajax call?
Ext.Ajax.request({
url: '/rmwb/resources/js/app/infoBar/data/data.json',
timeout: 60000,
method: 'GET',
scope: this,
params: '',
success: function(resp) {
console.log(resp.responseText);
//var store = Ext.data.StoreManager.lookup('Staging');
infoStagingStore.loadRawData(resp.responseText, true);
},
...

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